A212608 Deficient numbers n having a companion m > n such that sigma(n)/n = sigma(m)/m.

135, 3375, 1485, 2295, 2565, 3105, 3915, 4185, 4995, 5535, 5805, 6345, 25137, 7155, 7965, 8235, 9045, 9585, 9855, 10665, 11205, 12015, 13095, 13635, 13905, 14445, 14715, 43875, 15255, 16335, 17145, 17685, 18495, 18765, 57375, 20115, 20385, 21195, 64125

Offset

1,1

Comments

These numbers are listed in the order that their companions were found. All these numbers appear to have only one companion, which appear in A212609.

Links

Table of n, a(n) for n=1..39.

Crossrefs

Cf. A211680 (pairs of deficient numbers).

Sequence in context: A061073 A195671 A332428 * A212611 A004005 A248009

Adjacent sequences: A212605 A212606 A212607 * A212609 A212610 A212611

Keyword

nonn

Author

T. D. Noe, May 23 2012

Status

approved